Springless bushing terminal

Abstract

The utility model provides a kind of springless bushing end screen, belong to bushing end screen technical field, including flange seat, the inner cavity of flange seat is embedded with insulating seal cover, and insulating seal cover is connected in the inner cavity of flange seat by locking member, and the end portion of terminal post away from flange seat is provided with locking screw along outer wall, the inner wall of the side of flange seat away from flange hole is connected with grounding piece, and grounding piece is sleeved in the outside of locking screw, the outer wall of grounding piece is circumferentially provided with anti-skid line, the outer thread is circumferentially opened in the outer wall bottom of grounding piece, the inner thread is opened in the inner wall top of flange seat, so that grounding piece is threadedly connected in the inner cavity top of flange seat, after grounding piece is threadedly connected on flange seat, so that end screen is in the state of continuous grounding, in the case of guaranteeing overall stability, the stable operation of transformer is guaranteed, and the protection efficiency is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to bushing end screen technical field, concretely is a springless bushing end screen. BACKGROUND

[0002] The end screen of the transformer bushing is the tail end of the capacitor between the conductive rod and the ground in the bushing. It is a small bushing for grounding, usually located at the flange plate connecting the bushing and the oil tank. The end screen must be grounded during operation to ensure the electrical insulation performance and safe and stable operation of the bushing. The end screen is located inside the transformer bushing or the mutual inductor bushing, wrapped in the outermost layer of the multiple insulation layers of the primary wiring, and leads out the grounding through the insulating porcelain sleeve, so that the entire capacitor screen is fully immersed in the insulating oil.

[0003] As the last screen, the end screen plays a crucial role during operation. By connecting to the ground at the same potential, it can effectively protect the capacitor core and make the electric field on the surface of the outer insulation porcelain sleeve evenly distributed under the equalizing effect of the internal capacitor core, thereby improving the electrical insulation performance of the bushing.

[0004] The related technology (publication number: CN113903535B) discloses a high-voltage bushing end screen grounding device. The disclosed technical solution includes a protective cover, a terminal post, and a connecting assembly. The protective cover has a first insertion cavity, a second insertion cavity, and a communication hole. The connecting assembly includes a pusher and an abutting piece. When the pusher needs to be switched to the first position, the terminal post extends into the first insertion cavity. The pusher pushes the abutting piece so that it is located in the communication hole and radially inward along the terminal post. The side wall of the second insertion cavity, the pusher, the abutting piece, and the terminal post abut in sequence. That is, the terminal post is connected to the protective cover through the connecting assembly, and the protective cover is connected to the ground, thereby achieving the grounding of the terminal post.

[0005] In the above-mentioned disclosed technical solution, the following problems are found in the related technology: for the elastic end screen, when the spring sheet elasticity decreases or deforms, and there is an oxidation layer on the surface of the terminal post, it is easy to cause poor grounding or suspension of the end screen. This situation may cause poor contact between the end screen and the terminal post, affecting the safe operation of the bushing. If moisture enters during operation, the spring may rust and lose its elasticity, which will affect the grounding effect of the end screen. In addition, the displacement of the copper sleeve may also cause the end screen to be disconnected from the ground. During the long-term or multiple extrusion processes, the elasticity of the spring may gradually weaken, and if the extrusion force is not enough, it may cause poor grounding.

[0006] To solve the above problems, we propose a new type of springless bushing end screen.

[0007] It should be noted that the information disclosed in the above background section is only used to enhance the understanding of the background section of the present application, and therefore may include information that does not constitute prior art known to those skilled in the art. The utility model discloses content

[0008] The utility model discloses at least solve one of prior art or related art existing technical problem, in order to solve the problem of unstable grounding in the prior art, the utility model provides a springless bushing end shield adopts stable end shield structure and combines insulation protection structure to reach the effect of improving transformer security.

[0009] A springless bushing end shield, including flange seat, the inner chamber of flange seat inserts and is provided with insulation sealing sleeve, and the insulation sealing sleeve is clamped in the inner chamber of flange seat through locking member, the inner chamber of insulation sealing sleeve is provided with binding post, the end of binding post away from flange seat is opened with locking screw along the outer wall, the outer part of locking screw is connected with fixed piece and limiting piece respectively, the inner wall of flange seat is connected with grounding piece between fixed piece and limiting piece.

[0010] In the above technical scheme, the outer wall of the binding post is sleeved with a limiting clamp, and the side of the insulation sealing sleeve away from the locking screw is provided with a clamping groove.

[0011] The end of the binding post away from the locking screw is provided with a wiring piece, and the end of the wiring piece away from the locking screw is provided with a wiring hole.

[0012] The outer part of the flange seat is threadedly connected with a protective cap, and the protective cap covers the outside of the grounding piece.

[0013] The side of the flange seat away from the grounding piece is embedded with an insulating washer.

[0014] The outer part of the binding post is sleeved with a sealing washer.

[0015] The locking member includes a limiting sleeve seat embeddedly installed in the inner chamber of the flange seat, the side wall of the limiting sleeve seat is symmetrically provided with a clamping through slot, and the outer wall of the insulation sealing sleeve is symmetrically provided with a clamping piece clamped on the side wall of the insulation sealing sleeve.

[0016] The inner chamber of the flange seat is embedded with an annular locking piece, and the annular locking piece is sleeved on the outside of the insulation sealing sleeve.

[0017] Compared with the prior art, the utility model has the beneficial effects that the springless bushing end shield:

[0018] I. After the grounding piece is threadedly connected to the flange seat, the end shield is in a continuous grounding state, ensuring stable operation of the transformer and enhancing the protection effect.

[0019] Two, the fixed part is connected to the surface of the grounding part, so that the stability of the grounding part is ensured, and the fixed part is removed during testing, and then the grounding part is removed for detection, so that the operation process is more convenient.

[0020] Three, the limiting part is screwed to the lowest end of the locking thread, and then the grounding part is installed, the grounding part is limited, and then the fixed part is screwed outside the locking thread, so that the grounding part is fixed between the fixed part and the limiting part, and the stability of the grounding part is ensured.

[0021] Four, the grounding part is protected by the protective cap, so that the influence of external environment change on the grounding part is avoided. DETAILED DESCRIPTION

[0022] Figure 1 It is a spring-free sleeve end screen structure diagram of the utility model;

[0023] Figure 2 It is a structure explosion diagram of the spring-free sleeve end screen of the utility model Figure I ;

[0024] Figure 3 It is a structure explosion diagram of the spring-free sleeve end screen of the utility model Figure II ;

[0025] Figure 4 It is a structure explosion diagram of the utility model of the terminal post and the grounding part Figure I ;

[0026] Figure 5 It is a structure explosion diagram of the utility model of the terminal post and the grounding part Figure II ;

[0027] Figure 6 It is a structure section of the flange seat part of the utility model Figure I ;

[0028] Figure 7 It is a structure section of the flange seat part of the utility model Figure II ;

[0029] Among them, Figures 1 to 7 The correspondence between the reference signs and the component names in the drawing is as follows: 1-flange seat, 2-protective cap, 3-terminal post, 4-wiring part, 5-limiting seat, 6-insulating sealing sleeve, 7-grounding part, 8-fixed part, 9-locking thread, 10-insulating gasket, 11-sealing gasket, 12-slot, 14-connection through slot, 15-limiting sleeve, 17-limiting part, 18-connection part, 19-ring locking part, 20-wiring hole. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model. Figure 1 -Appendix Figure 7 The utility model will be further described, but the utility model is not limited to these embodiments.

[0032] A springless bushing terminal screen, including flange seat 1, the inner chamber of flange seat 1 is embedded with insulating sealing sleeve 6, and the insulating sealing sleeve 6 is clamped in the inner chamber of flange seat 1 by locking member. Flange seat 1 is in a stepped shape, and a flange hole is formed in the circumference of flange seat 1, thereby bringing convenience to installation. The insulating effect is improved by the insulating sealing sleeve 6, thereby ensuring safety. The inner chamber of insulating sealing sleeve 6 is throughly provided with a terminal post 3, and a locking thread 9 is formed in the outer wall of the end of terminal post 3 away from flange seat 1. A grounding piece 7 is threadedly connected to the inner wall of the side of flange seat 1 away from the flange hole, and the grounding piece 7 is sleeved on the outside of locking thread 9.

[0033] Anti-skid lines are circumferentially arranged on the outer wall of grounding piece 7, and external threads are circumferentially formed in the bottom of the outer wall of grounding piece 7. Internal threads are formed in the top of the inner wall of flange seat 1, so that grounding piece 7 is threadedly connected to the top of the inner chamber of flange seat 1. After grounding piece 7 is threadedly connected to flange seat 1, the terminal screen is in a state of continuous grounding, and the stable operation of the transformer is ensured under the condition of ensuring the overall stability, thereby enhancing the protection effect.

[0034] A fixing piece 8 is threadedly connected to the outside of locking thread 9, and the fixing piece 8 is clamped on the side wall of grounding piece 7. The fixing piece 8 can be a nut. After grounding piece 7 is threadedly connected to flange seat 1, the fixing piece 8 is screwed on locking thread 9, and the fixing piece 8 is clamped on the surface of grounding piece 7, thereby ensuring the stability of grounding piece 7. When testing, the fixing piece 8 is removed, and then grounding piece 7 is removed for detection, so that the operation process is more convenient.

[0035] The outside of locking thread 9 is threadedly connected to a limiting piece 17, and the limiting piece 17 is located on the side close to flange seat 1.

[0036] The limiting piece 17 can be a nut, and the limiting piece 17 is screwed to the lowermost end of the locking thread 9, and then the grounding piece 7 is installed, which limits the grounding piece 7, and then the fixing piece 8 is screwed outside the locking thread 9 again, so that the grounding piece 7 is fixed between the fixing piece 8 and the limiting piece 17, thereby ensuring the stability of the grounding piece 7.

[0037] The limiting piece 17 is located below, and the fixing piece 8 is located above, so that a locking space is formed between the limiting piece 17 and the fixing piece 8. After the grounding piece 7 is sleeved outside the locking thread 9, and the limiting piece 17 and the fixing piece 8 are screwed to the surfaces on both sides of the grounding piece 7 respectively, the stability of the terminal post 3 is increased, and the stability of the terminal post 3 is ensured by fixing the terminal post 3 at multiple points.

[0038] The outer wall of the terminal post 3 is sleeved with a limiting seat 5, and the insulating sealing sleeve 6 is provided with a clamping groove 12 away from the locking thread 9. The limiting seat 5 is clamped in the clamping groove 12. The installation position of the insulating sealing sleeve 6 is limited by the clamping groove 12, thereby ensuring the stability of the installation position of the terminal post 3.

[0039] The terminal post 3 is provided with a terminal piece 4 away from the locking thread 9, and the terminal piece 4 is provided with a terminal hole 20 away from the locking thread 9. When the terminal piece 4 is connected with the transformer, the terminal hole 20 is used for connection.

[0040] It is worth noting that the flange seat 1 is externally threaded with a protective cap 2, and the protective cap 2 covers the outside of the grounding piece 7. The outer wall of the protective cap 2 is circumferentially provided with anti-skid lines, which play an anti-skid effect when disassembling and assembling. The outer wall of the flange seat 1 is provided with an external thread at the top, and the inner wall of the protective cap 2 is provided with an internal thread connected with the protective cap 2. The protective cap 2 protects the grounding piece 4, avoiding the influence of external environmental changes on the grounding piece 4.

[0041] In addition, the flange seat 1 is embedded with an insulating gasket 10 away from the grounding piece 4. The insulating gasket 10 is made of rubber, and the flange seat 1 is circumferentially provided with an embedding groove at the bottom. The insulating gasket 10 is fixedly embedded in the embedding groove, thereby playing an insulating effect and improving the protection.

[0042] In addition, the terminal post 3 is externally provided with a sealing gasket 11. The sealing gasket 11 is made of rubber, and the sealing gasket 11 is attached to the surface of the limiting seat 5 after being sleeved on the outside of the terminal post 3, thereby improving the sealing effect.

[0043] Further, the locking member includes a limiting sleeve 15 embeddedly installed in the inner cavity of the flange seat 1, and the side wall of the limiting sleeve 15 is symmetrically provided with a clamping through groove 14. The outer wall of the insulating sealing sleeve 6 is symmetrically provided with a clamping piece 18 clamped on the side wall of the insulating sealing sleeve 6.

[0044] When the insulating sealing sleeve 6 is installed, the insulating sealing sleeve 6 is inserted into the inner cavity of the limiting sleeve seat 15, and the clamping pieces 18 on both sides of the insulating sealing sleeve 6 are inserted into the clamping through slot 14; after the clamping pieces 18 are inserted into the clamping through slot 14, the insulating sealing sleeve 6 is clamped at the bottom of the limiting sleeve seat 15 due to the stepped shape of the insulating sealing sleeve 6, and then the insulating sealing sleeve 6 is rotated to make the clamping pieces 18 clamped at the top of the limiting sleeve seat 15, so that the insulating sealing sleeve 6 is clamped and fixed in the inner cavity of the flange seat 1.

[0045] The inner cavity of the flange seat 1 is embedded with the annular locking piece 19, and the annular locking piece 19 is arranged outside the insulating sealing sleeve 6; when the insulating sealing sleeve 6 is installed, the insulating sealing sleeve 6 is clamped and matched with the notched block arranged on the flange seat 1. The top of the annular locking piece 19 is provided with an operation groove, a tool is clamped in the groove through the end, the annular locking piece 19 is rotated in the inner cavity of the flange seat 1, the annular locking piece 19 is fixed in the inner cavity of the flange seat 1 through interference fit and screw fit of the annular locking piece 19 and the inner cavity of the flange seat 1, and the annular locking piece 19 is attached to the top of the clamping piece 18, so that the insulating sealing sleeve 6 is clamped and fixed in the flange seat 1. Further, the stability of the position of the terminal screen is ensured.

[0046] In the description of the present application, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0047] In addition, the terms "first", "second", "third", "fourth" are only for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features, so that the features limited by "first", "second", "third" and "fourth" can be explicitly or implicitly included at least one of the features.

[0048] In the utility model, unless another definite provision and limitation, the term "installation", "arrangement", "connection", "fixation", "screw connection" and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can indirectly connect through intermediate medium, can be two element inside's intercommunication or two element's mutual action relation, unless another definite limitation, for the ordinary skill of the art, can understand the above-mentioned term in the utility model specific meaning according to specific circumstances.

[0049] Although the embodiments of the utility model have been shown and described, it will be appreciated by those of ordinary skill in the art that various changes, modifications, alternatives, and variations can be made thereto without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A springless bushing terminal, characterized by: The application relates to a flange seat (1), an inner cavity of the flange seat (1) is embedded with an insulating sealing sleeve (6), the insulating sealing sleeve (6) is clamped in the inner cavity of the flange seat (1) through a locking member, an inner cavity of the insulating sealing sleeve (6) is through-provided with a terminal post (3), an outer wall of the terminal post (3) is provided with locking threads (9) at an end portion away from the flange seat (1), an outer part of the locking threads (9) is respectively connected with a fixing member (8) and a limiting member (17), and an inner wall of the flange seat (1) is threadedly connected with a grounding member (7) between the fixing member (8) and the limiting member (17).

2. A springless bushing terminal according to claim 1, characterized in that: The outer wall of the terminal post (3) is sleeved with a limiting clamping seat (5), one side of the insulating sealing sleeve (6) away from the locking threads (9) is provided with a clamping groove (12), and the limiting clamping seat (5) is clamped in the inner part of the clamping groove (12).

3. A springless bushing terminal according to claim 1, characterized in that: The terminal post (3) is provided with a terminal member (4) at an end portion away from the locking threads (9), and the terminal member (4) is provided with a terminal hole (20) at an end portion away from the locking threads (9).

4. A springless bushing terminal according to claim 1, characterized in that: The outer part of the flange seat (1) is threadedly connected with a protective cap (2), and the protective cap (2) covers the outer part of the grounding member (7).

5. A springless bushing terminal according to claim 1, wherein: The flange seat (1) is embedded with an insulating gasket (10) at a side away from the grounding member (7).

6. A springless bushing terminal according to claim 1, characterized in that: The outer part of the terminal post (3) is sleeved with a sealing gasket (11).

7. A springless bushing terminal according to claim 1, wherein: The locking member comprises a limiting sleeve seat (15) embeddedly installed in the inner cavity of the flange seat (1), the side wall of the limiting sleeve seat (15) is symmetrically provided with clamping through grooves (14), and the outer wall of the insulating sealing sleeve (6) is symmetrically provided with clamping members (18) clamped on the side wall of the insulating sealing sleeve (6).

8. A springless bushing terminal according to claim 7, characterized in that: The inner cavity of the flange seat (1) is embedded with an annular locking member (19), and the annular locking member (19) is sleeved on the outer part of the insulating sealing sleeve (6).

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